Loans and Allowance for Credit Losses - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 12,003,894	$ 9,241,861
Commercial and industrial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,437,126	2,714,565
Agricultural land, production and other loans to farmers
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	241,793	246,442
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	835,582	523,066
Commercial real estate, non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,407,475	2,135,459
Commercial real estate, owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,246,528	986,720
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,096,655	1,159,127
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	630,632	523,754
Individuals' loans for household and other personal expenditures
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	175,211	146,092
Public finance and other commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 932,892	$ 806,636